摘要
The energy consumption in a batch rectifier and a batch stripper was investigated with a shortcut mathematical model.The minimum energy consumption of a batch stripper was compared to that of a batch rectifier under“general constant reflux”and“general constant distillate composition”with the ratio of minimum energy consumption E_(S)/E_(R).When the feed contains a large amount of light component,the product purity specification is low and the relative volatility is small,the minimum energy consumption of a batch stripper is less than that of a batch rectifier under“general constant reflux”and“general constant distillate composition”.When the feed contains a small amount of light component,the product purity specification is very high and the relative volatility is low,a batch stripper can also consume less energy only in the“general constant distillate composition”operation mode.In other cases,a batch rectifier can consume less energy.
